What causes shingles to curl, crack, or lose granules?

Shingle curling and cracking are usually signs of age and prolonged sun and heat exposure, which dry out the asphalt over time. Poor attic ventilation makes this worse by trapping heat and moisture underneath the roof deck, accelerating wear from below. Granule loss often shows up after hail impacts or simply as a shingle nears the end of its useful life, and it's a warning sign worth taking seriously since those granules protect the asphalt layer underneath from UV damage. If you're noticing any of these signs, it's a good idea to schedule a free roof inspection so we can tell you whether a repair or a full replacement makes more sense.